Re: [patch 8/8] PCI Error Recovery: PPC64 core recovery routines

[Linas Vepstas]

On Fri, Aug 26, 2005 at 09:37:36AM +1000, Benjamin Herrenschmidt was heard to remark:
> On Fri, 2005-08-26 at 09:18 +1000, Paul Mackerras wrote:
> > Benjamin Herrenschmidt writes:
> > 
> > > Ok, so what is the problem then ? Why do we have to wait at all ? Why
> > > not just unplug/replug right away ?
> > 
> > We'd have to be absolutely certain that the driver could not possibly
> > take another interrupt or try to access the device on behalf of the
> > old instance of the device by the time it returned from the remove
> > function.  I'm not sure I'd trust most drivers that far...
> 
> Hrm... If a driver gets that wrong, then it will also blow up when
> unloaded as a module. 


:)  We've discovered two, so far, that blow up when unloaded: 
    lpfc and e1000. I beleive these are now fixed in mainline.

--linas
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